<template>
  <div class="image-preview">
    <el-image v-if="!multiple" :src="`${realSrc}`" fit="cover" :style="`width:${realWidth};height:${realHeight};`" :preview-src-list="realSrcList">
      <div slot="error" class="image-slot">
        <i class="el-icon-picture-outline"></i>
      </div>
    </el-image>
    <template v-if="multiple&&realSrcList.length>0">
      <el-image v-for="(item,index) in realSrcList" :key="index" :src="item" fit="cover" :style="`width:${realWidth};height:${realHeight};`" :preview-src-list="realSrcList">
        <div slot="error" class="image-slot">
          <i class="el-icon-picture-outline"></i>
        </div>
      </el-image>
    </template>

  </div>
</template>

<script>
import { isExternal } from "@/utils/validate";

export default {
  name: "ImagePreview",
  props: {
    src: {
      type: String,
      default: "",
    },
    width: {
      type: [Number, String],
      default() {
        return 40;
      },
    },
    height: {
      type: [Number, String],
      default() {
        return 40;
      },
    },
    multiple: {
      type: Boolean,
      default: false,
    },
  },
  computed: {
    realSrc() {
      if (!this.src) {
        return;
      }
      let real_src = this.src.split(",")[0];
      if (isExternal(real_src)) {
        return real_src;
      }
      return process.env.VUE_APP_BASE_API + real_src;
    },
    realSrcList() {
      if (!this.src) {
        return;
      }
      let real_src_list = this.src.split(",");
      let srcList = [];
      real_src_list.forEach((item) => {
        if (isExternal(item)) {
          return srcList.push(item);
        }
        return srcList.push(process.env.VUE_APP_BASE_API + item);
      });
      return srcList;
    },
    realWidth() {
      return typeof this.width == "string" ? this.width : `${this.width}px`;
    },
    realHeight() {
      return typeof this.height == "string" ? this.height : `${this.height}px`;
    },
  },
};
</script>

<style lang="scss" scoped>
.image-preview{
  display: flex;
  flex-wrap: wrap;
}
.el-image {
  border-radius: 5px;
  background-color: #ebeef5;
  box-shadow: 0 0 5px 1px #ccc;
  margin: 0px 10px 10px 0px;
  :deep(.el-image__inner) {
    transition: all 0.3s;
    cursor: pointer;
    &:hover {
      transform: scale(1.2);
    }
  }
  :deep(.image-slot) {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    height: 100%;
    color: #909399;
    font-size: 30px;
  }
}
</style>
